How to calculate caco3 equivalent , Chemistry

Q. Ca+2 = 20 ppm, Mg+2 = 25 ppm, CO2 = 30 ppm, HCO-3 = 150, K+ = 10 ppm. Calculate the lime (87% pure) and soda (91% pure) required softening 1 million litters of water sample.

Ans.

Calculation of CaCO3 equivalent of given impurities:

S.NO

substances

Amount of substances in mg/L

Multiplication factor

CaCO3 equivalent mg/L

1.

Ca++

20 ppm

100/40

100/40*20 =50

2.

Mg++

25 ppm

100/24

100/24*25 = 104.16

3.

CO2

30 ppm

100/44

100/44*30  = 68.181

4.

HCO-3

150 ppm

100/122

100/122*150 = 122.95

5.

K+

10 ppm

Not produce hardness

 

Lime required:

74/100[Mg++ + CO2 + HCO-3 as CaCO3 equivalent] mg/L *Volume of water*100/%purity

74/100[104.16 + 68.181 + 122.95] mg/L*1000000l*100/86

74/100[295.29] mg/L * 100000*100/87

= 251.16*106 mg

= 251.16*106 mg*1Kg/106

= 251.16

Soda required = 106/100[50 + 104.16 – 122.95] mg/L *1000000*100/91

   = 100/106[31.21] mg/L*106*100/91

   = 36.35*106 mg

   = 36.35*106 mg*1Kg/106

    = 36.35Kg

Posted Date: 7/21/2012 9:19:56 AM | Location : United States







Related Discussions:- How to calculate caco3 equivalent , Assignment Help, Ask Question on How to calculate caco3 equivalent , Get Answer, Expert's Help, How to calculate caco3 equivalent Discussions

Write discussion on How to calculate caco3 equivalent
Your posts are moderated
Related Questions
Q. What is paired comparison test? In paired comparison test, the assessor is presented with two products and asked to indicate whether there is a preference between them.

the periodic table

Reaction of conjugate addition This reaction is a "conjugate addition" of cyanide ion on a cyclopropane.  Notice that reaction at the least branched carbon of the cyclopropane

Molecular weight of orthophosphoric acid is M. Its equivalent weight is

Uses of Glucose (a) Glucose is used in the conservation of fruits and making of jams and jellies. (b) Glucose is used in the preparation of confectionary and as a sweetening

Explain about the interstitial defects An interstitial is an atom that occupies a place outside the normal lattice position. It might be the similar type of atom as the others

Q. Explain Dalton’s atomic theory? The atomic theory In 1808 John Dalton projected a theory to explain the laws of conservation of matter definite proportions and multiple prop

Which of the following halides has maximum melting point: (1) NaCl    (2)  NaBr                          (3)  Nal                                                   (4


transition elements form coloured compound. Why?